Capacitors provide high reliability for +28V power supplies in military and aerospace apps

Vishay Intertechnology
Inc. has extended its TANTAMOUNT 597D series of commercial solid tantalum chip
capacitors with a new Hi-Rel version approved to Defense Logistics Agency (DLA)
Specification 13008. Built with Vishay's proprietary high-voltage dielectric
formation process, the Vishay Sprague 13008 series is intended for +28 V
power supply designs in military and aerospace applications.

The
capacitors are optimized for DC/DC conversion and power distribution in weapons
and radar systems, avionics, and space-based electronics. To ensure performance
in these safety-critical applications, the devices offer high-reliability
screening and surge current testing options in accordance with MIL-PRF-55365.

Available
in nine case sizes, 13008 series capacitors provide a wide array of ratings not
previously found in available MIL specifications, including a capacitance range
of 10 µF to 1500 µF over a voltage range from 4 V to 63 V. The devices' 63 V
rating allows designers to meet derating requirements of 50 % rated voltage for
use in MIL-STD-1275 +28 V power supply designs. Their dual anode construction
ensures the lowest ESR in their class, down to 0.015 O at +25 °C and 100
kHz.

The 13008
series operates over a temperature range of -55 °C to +85 °C, to +125 °C with
voltage derating. With their conformal coating, the capacitors offer better
volumetric efficiency than molded devices. This allows for higher capacitance-voltage
(CV), a figure of merit that measures the amount of energy a capacitor can
store.

Samples
and production quantities are available now,
with lead times of 12 to 14 weeks for larger orders. Pricing for U.S. delivery
starts at $4 per piece and varies by screening level and volume.